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영어

The productivity and cost of clear cutting operations were examined to broaden our knowledge on the harvesting system in a Larix leptolepis stand of Korea. The harvesting system was divided into tree operations which were chainsaw (STIHL MS440) felling, tower yarder (Koller301-4) yarding and harvester (WOODY H50) processing. The average cycle time of felling, yarding and processing were 98 s/cycle, 245 s/cycle and 150 s/cycle. The total stump-to- pile operational productivity was 43.07 m3/hr. The highest production activity was the felling 17.93 m3/hr, followed by the productivity of processing 15.62 m3/hr and then by the productivity of yarding 9.52 m3/hr. In addition the total stump- to-pile operational cost was 24,086 won/m3. The highest cost activity was the yarding 14,557 won/m3 (60.4% of the total cost), followed by the costs of processing 8,461 won/m3 (35.2%) and then by the costs of felling 1,068 won/m3.